convenient synthesis of carbazole-1,4-quinone alkaloid koeniginequinones A and B using a tandem ring-closing metathesis with the dehydrogenation reaction sequence under an O2 atmosphere as an important step. Using this method, carbazole-1,4-quinones substituted at the 5-, 6-, 7-, and/or 8-positions have been synthesized. Moreover, 24 compounds, including koeniginequinones A and B, have been evaluated for
Synthesis and reactions of new 2-hydroxymethyldimethoxyindoles
作者:Murat Bingul、Naresh Kumar、David StC. Black
DOI:10.1016/j.tet.2015.11.038
日期:2016.1
to prepare a range of 2-hydroxymethyldimethoxyindole derivatives from the relatedmethyl esters. Acid-catalysed reactions of these indole-2-methanols yielded indolo-cyclotriveratrylenes linked through C-2 and C-3. The related indole-2-carbaldehydes were prepared via oxidation of the indole-2-methanols in the presence of manganese dioxide. Vilsmeier formylation was explored to prepare new formylated